Thinking about going to look a some 288's for sale, is there any difference's between a '05 to a '08. Have they changed the hull design's?

I believe they did a hull change from 04 to 05 and went to a full step. Also upgraded the interior design etc...
I will say one thing tho... go with the 32 the first time to save yourself the grief bc once u have the 288 you will want the 32. Not much room in either but a little more in the 32 obviously and you will really benefit from the twins both in speed (another 10-15 mph on average depending on motors) and in ride/handling.
Good luck either way! Hope to see some pics soon!